1 / 8

Introduction to the Atom

An atom is the basic building block of matter, defined as the smallest particle of an element that retains its properties. The atom consists of a dense nucleus containing protons and neutrons, which accounts for over 99% of its mass. Surrounding the nucleus are electrons, negatively charged particles in constant motion. This overview explores the structure of atoms, the roles of protons, neutrons, and electrons, and introduces the planetary model of the atom, illustrating the relationship between its components and the nature of matter.

vaughn
Download Presentation

Introduction to the Atom

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction to the Atom Protons, neutrons, electrons and the nucleus

  2. What is an atom? An atom is the smallest particle of an element that can be broken down and still have the characteristics of that element Basic building block of matter

  3. The Nucleus The nucleus of an atom is the positive dense core of the atom. Contains more than 99% of the atom’s mass.

  4. 3 Subatomic Particles • Atoms are composed of 3 subatomic particles: • Protons • Neutrons • Electrons

  5. The Electron Negatively charged subatomic particle Discovered in 1897 by J.J. Thomson Symbol: e- Charge = -1 In constant motion orbiting nucleus

  6. Protons • Positively charged subatomic particles • Discovered by Ernest Rutherford • Charge is equal but opposite that of an electron • Charge = +1 • Symbol: p+ • Located in nucleus

  7. Neutrons Subatomic particle with no charge (neutral) Discovered by James Chadwick Mass equal to proton’s symbol : n0 Charge = 0 Located in nucleus

  8. Planetary Model of Atom

More Related